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Jellyfish
Found in every ocean, jellyfish are not technically "fish." Jellies have an umbrella like structure that allows them to float beautifully in the water. Watch out though, some of them sting!
1,930 Questions
What is jellyfish and insects are alike?
The jellyfish and the worm are both invertebrates, which means they are animals without backbones.
Sleep, as humans know it, is a brain activity where certain functions decrease in activity. Jellyfish do not have a brain. This means that, technically, they do not sleep. However, they do have periods of resting where they either hang in the water without moving or lie on the bottom of the ocean without moving.jelly fish do not sleep. they have no eyes - they just float in the ocean actually their is one type of jellyfish that does sleep! its the box jellyfish! otherwise known as the irukandji
Jellyfish belong to which class?
* Class: Hydrozoa * Class: Staurozoa * Class: Polypodiozoa * Class: Scyphozoa * Class: CubozoaThere are mutliple classes because there are multiple types of jelly-fish.
In the wild, a jelly fish grazes on food as long as it's there. It will vary from day to day.
What types of jellyfish are endangered?
There are over 200 species of jellyfish and most of them are salt water species who are not anywhere close to extinction. The fresh water jellyfish are the ones facing extinction around the world. One of the known species Craspedacusta sowerbyi aka the peach (or orange) blossom jellyfish is usually found in China and is facing extinction. It's existed for roughly 1.5 billion years but the species has become extinct in other geographic areas around the world. Part of theory on why extinction is becoming prevalent because most populations found have all males or all females, making reproduction more challenging.
Are cnidarians deadly to humans why or why not?
Yes, for example, Jellyfishes are Cnidarians.
They could sting people.
Physalias eat fish. A study of a sister species, P. physalis in Florida found nearly 100% larval and adult fish remains in the jelly. A tiny amount of crustacean remains were found, but that was assumed to have been ingested by the fish that the jelly then consumed.
How do jellyfish obtain water?
They don't, they live in it and it diffuses in and out of their bodies.
How do you cure a jellyfish sting?
This is important to know, because dealing with "unfired" cells is the first step. Note that there have been fatalities from stings, especially associated with anaphylaxis, so not exposing the rescuer is critical. (According to the medical dictionary, anaphylaxis is "a type of allergic reaction, in which the immune system responds to otherwise harmless substances from the environment, e.g., an allergic reaction.)
The Treatment Steps1. Tend to breathing, if this is an issue. Remember to protect the rescuer here. Be on the lookout for anaphylactic reactions.2. If there is a chance the cells still remain on the skin, you need to remove them. The best way is to make a paste of baking soda and seawater, gently spreading that over the affected area, and gently scraping it off with a dull edge (like a butter knife). If not all the ingredients are available, do the best you can -- but try not to agitate untriggered cells. You can replace baking soda with talcum powder, mud, etc., or even skip it if you can't find any. DO NOT USE FRESH WATER! THIS TRIGGERS THE CELLS. Do not scrub the affected area (with sand or anything else), as this triggers unfired cells.
3. If you have Alcohol (EToH or Methanol), pour it liberally over the affected site. This seems to numb remaining cells.
4. If caught within the first hour or two of contact, you can try to denature the proteinic toxins by applying a hot compress to the affected area for 10-15 minutes. BE CAREFUL NOT TO BURN THE PATIENT. But make the compress as hot as the person can comfortably and safely handle.
5. Apply cold compresses to dull the pain, although this will not really remove it.
6. In more serious cases, systemic painkillers may be called for. I've never had topical painkillers work at all, as the toxins seem to be antagonistic to Benzocaine and the like, but it probably wouldn't hurt if applied at the end of all the procedures.
Urine, Yay or NayI have heard of urinating on the affected area. But I've never had this work for me. Actually, urine is more than likely just another way of accidentally triggering unfired cells. Urine contains small amounts of ammonia, which supposedly neutralizes the agents. It can be tried in an emergency, but I wouldn't count on miraculous results.How do jelly fish work if they have no brain?
Jellyfish are alive because they grow, reproduce, respire, and respond to stimuli. Simply because an animal or other organism does not have a centralized brain, circulatory system, or even distinct organs does not mean it is not alive.
Are Jellyfish nocturnal or diurnal?
Moon jellies do not sleep, so they are both diurnal and nocturnal.
Its very painful, yet it all depends on what species of Anemone you've touched. The best way to describe the sting would be very sharp. Its kind of feels like a couple of pin coushions being pierced all at once.
How can you protect yourself from a jellyfish?
Keep out of the ocean, or be extremely careful. The sting is painful, and some species can be deadly.
^^^This wasn't helpful...i would like to still be able to go in the ocean without being stung if possible...any suggestions?
The word cnidarian mean stinging cells why is this a good name for this group?
This is a good name for this group because i consists of jellyfish that use their stinger for defense.
How much food can a jellyfish fit in their stomach?
Jellyfish have a mouth that they place food into. Their bodies aren't very complex but they do have a stomach and intestines. They are carnivores which means that they eat other living creatures. They tend to rely on the current of the water and the wind to help them find food. They trap food in their tentacles and then move it to their mouth. The tentacles are sticky so there is no problem with catching food.
Other Jellyfish that are larger though have the ability to swim vertically rather than just relying on the current and the wind. They consume crustaceans, small fish, and even other smaller species of Jellyfish. They are opportunistic and they will take the time to eat anything that may be available. It is amazing how much plankton they can consume when it is readily available.
They can consume prey that is almost as large as they are too. They don't mind taking on the larger ones. Their tentacles have powerful toxins that immobilize the prey long enough for them to consume it. They have the ability to detect the slightest movement around them.
By nature the Jellyfish has the response of stinging everything that they come into contact with. This is how they get their prey and are able to take every opportunity to consume food. Unfortunately they can't tell the difference between humans and their prey. When a human gets sting it is due to the natural processing of the Jellyfish. They don't have eyes (except the box jellyfish) or a brain. Everything is sensor oriented for them in terms of finding their food.
However, the Jellyfish is highly adaptable and that is why they have been able to survive in so many variables around the oceans. For example when food supplies are scarce they are less likely to take part in creating offspring. This helps to limit the competition they will have for food later on. It helps to keep the balance of things in the ocean in perspective for the Jellyfish species.
They will also do all they can to conserve energy when food supplies are hard to find. This includes not swimming vertically to use up any energy. Instead, they will allow themselves to float along with the wind and the current of the water. They don't expel any energy that would cause it to be harder for them to survive on so little food for that period of time.
Another survival technique they use is adapting to different temperatures of the ocean and different depths. If food is hard to find they may go deeper into the water or closer to the shore. When large numbers of Jellyfish are found close to the shore it is a prime indicator that they aren't getting enough food to eat in their natural locations in that body of water.
The stomach of the Jellyfish is a large cavity. Once the prey is in the tentacles it will be taken to the mouth. It will be swallowed whole and then deposited into the stomach. They don't have teeth or a way to chew up their food. The stomach has special lining that helps to reduce the prey in the stomach into nutrients that the body can use for survival.
The fact that 95% of the body of a Jellyfish is water is really fascinating to experts. They are in awe of the overall feeding abilities of them in spite of only 5% of the body being solid materials. This is why the overall feeding habits of the Jellyfish continues to be something they are interested in. They also strive to identify the varied eating habits of different species of Jellyfish.
What is the worlds most deadlist jellyfish?
The smallest deadliest jellyfish is the Malo Kingi Jellyfish which is a type of Irukandji Jellyfish. It inhabits the waters of Northern Australia and is no larger than an adults fingernail making them impossible to see in the water. There are two types of Irukandji Jellyfish the Malo Kingi and the Carukia Barnesi. If these jellies don't kill you they will at least leave you with a nasty case of Irukandji syndrome which results in such symptoms as headaches, nausea, restlessness, sweating, vomiting, high heart rate and blood pressure, not to mention severe back pains, muscle cramps, kidney pains and an intense skin burning sensation.
How are cnidarians more advanced then jellyfish?
Sponges are less complex because they are just made of individual cells. There is no level of organization past cells in sponges. Cnidarians, on the other hand, have tissues, a higher level of organization. Tissues allow for some forms, like box jelly fish, to have eyes (this is just one of many advantages of tissues). Cnidarians' level of organization stops there though, they have no organs (heart, brain, etc.).
How do jellyfish respond to stimuli?
When a Stingray reacts to stimulus it discharges stinging cells. The stinging cells penetrate the skin and inject a poisonous venom.
